<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据表</el-breadcrumb-item>
        </el-breadcrumb>

        <el-card>
            <!-- 为 ECharts 准备一个具备大小（宽高）的 DOM -->
            <div id="main" style="width: 600px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
  import * as echarts from 'echarts';
  import _ from  'lodash'

  export default {
    name: "Report",
    data(){
      return{
        //需要合并的对象
        options: {
          title: {
            text: '用户来源'
          },
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'cross',
              label: {
                backgroundColor: '#E9EEF3'
              }
            }
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              boundaryGap: false
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ]
        }
      }
    },
    components:{
    },
    methods:{

    },
   async mounted() {
      //此时页面已被渲染完毕了. dom才能初始化
      // 基于准备好的dom，初始化echarts实例
      var myChart = echarts.init(document.getElementById('main'));

      //请求折线图数据
    const {data:res} = await this.$http.get(`reports/type/1`)
     if (res.meta.status !==200) return this.$message.error('获取折线图失败')

      //准备数据和配置项   合并两个对象
      const result= _.merge(res.data,this.options)

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(result);
    }
  }
</script>

<style scoped>

</style>